CN101149905A - Liquid crystal drive system column driven circuit implement method and dedicated column decoding circuit - Google Patents
Liquid crystal drive system column driven circuit implement method and dedicated column decoding circuit Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 20
- 239000011159 matrix material Substances 0.000 claims abstract description 74
- 238000012545 processing Methods 0.000 claims abstract description 40
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3625—Control of matrices with row and column drivers using a passive matrix using active addressing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3692—Details of drivers for data electrodes suitable for passive matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0205—Simultaneous scanning of several lines in flat panels
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- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The method for realizing column drive circuit in liquid crystal drive system includes: reversing matrix signals; matrix operating the data signals and the reversed matrix signals; inputting the signals after matrix operated into a signal non-crossover processing circuit. A special column decoding circuit is also disclosed, the signal processing circuit of which reverses the matrix signals and matrix operates the signals and then sends them into a non-crossover clock circuit to process. Advantage: simple column-decoding circuit, low power-consumption and low cost.
Description
Technical field
The present invention relates to the system that liquid crystal display drives, relate in particular to the implementation method and the device of the column drive circuit in the multirow liquid crystal drive system.
Background technology
Display panels is owing to have advantages such as volume is little, in light weight, low-voltage, low-power consumption, occupy more and more vast market in portable demonstration field, wherein supertwist nematic phase type (STN Supertwisted nematic) liquid crystal accounts for very big market in small-medium size LCD field, and its special advantages is arranged.
STN type liquid crystal is the same with TFT type liquid crystal, require to improve display quality and response speed, reduces shade and produces, and improves the ratio of performance to price, simultaneously, also requires low-power consumption, high-contrast, crosstalks less, wide temperature range and frame frequency response fast.
The appearance of fine scanning type of drive (MLA multi-line addressing), improved the inferior position of progressive scan mode (SLA simple-line addressing) greatly, can improve above-mentioned requirement to a great extent, better meet the requirement of application.
And the MLA type of drive is also along with development of technology is being continued to optimize, developed.At present, the MLA type of drive can be divided into two big classes, and a class is traditional MLA modulation system, adopts the N*N matrix algorithms to realize; Another kind of is the MLA modulation system of optimizing, and adopts (N-1) * N matrix algorithms to realize, in the US20040189581 patent, KAWASAKI company has provided the matrix algorithms of the MLA driving of optimizing.
On circuit is realized, comprise column decoding (SEG DECODER), signal treatment circuit (the BBM that do not overlap, Break before make), level shifter (level-shffi) and voltage selector (level-selected) etc., the data that are shown output to column decoding from register, processing through decoding circuit, the control signal that obtains is handled through the clock circuit that do not overlap again, delivers to level displacement shifter again, after level transforms, deliver to the column voltage selector switch, the selection driving voltage of falling out outputs on the LCD screen, obtains wanting data presented.Adopt decoding earlier at column decoding in to the Signal Processing process, then carry out field and handle, upset is handled, as described in " design of LCD Multi Line Selection Driver IC " article in technical journal " solid state electronics research and make progress " 11 monthly magazines in 2003.Elder generation's decoding (promptly wanting advanced row matrix algorithm) is so each field of requirement will have a corresponding decoding circuit that it is carried out the matrix operation processing, so the decoding circuit complexity; And the circuit that carries out matrix operation originally mainly adopt multiplier and totalizer in conjunction with or dynamic circuit realize, and these circuit itself with regard to the circuit complexity, area is big, power consumption is big.
Summary of the invention
One of technical matters to be solved by this invention provides that circuit is simple, the implementation method of column drive circuit in low-power consumption, low cost, the liquid crystal drive system easily realized.
Described implementation method comprises following job step:
A, control circuit output to column decoding with data synchronously from data register, and simultaneously, the matrix signal of field signal control also outputs to column decoding;
B, column decoding are handled data, output to the signal treatment circuit that do not overlap;
C, the signal circuit that do not overlap is handled signal, delivers to level displacement circuit;
After D, the process level shift, output to voltage selector;
E, select voltage, deliver on the electrode of display panel video data on display panel through voltage selector;
It is characterized in that: comprise following step among the described step B:
B1, at first to the matrix signal processing of overturning;
B2, the matrix signal that data-signal and process energizing signal are handled carry out the matrix operation processing;
B3, the signal after matrix operation handled output to signal among the step C treatment circuit that do not overlap.
Several steps among the described step B is:
B1, signal processing circuit are at first to the matrix signal processing of overturning;
B2, data-signal and the matrix signal of handling through energizing signal are sent into demoder synchronously and are carried out the matrix operation processing;
B3, Control of Voltage selector switch select corresponding voltage control signal according to the output of demoder, output to signal among the step C treatment circuit that do not overlap.
Two of technical matters to be solved by this invention provides the dedicated column decoding of the implementation method of above-mentioned column drive circuit.
But described column decoding comprise matrix signal overturn the signal processing circuit handled, can carry out the decoding circuit that matrix operation is handled, the data that are shown output to column decoding from register, processing through column decoding, the control signal that obtains is handled through the clock circuit that do not overlap again, it is characterized in that: signal processing circuit is at first to the matrix signal processing of overturning; Decoding circuit carries out delivering to after matrix operation is handled the clock circuit that do not overlap to the matrix signal of handling through upset again to be handled.
Described decoding circuit comprises demoder, the Control of Voltage selector switch of logical combination, and signal processing circuit is at first to the matrix signal processing of overturning; Data-signal and the matrix signal of handling through energizing signal are sent into demoder synchronously and are carried out the matrix operation processing; The Control of Voltage selector switch is selected corresponding voltage control signal according to the output of demoder, outputs to the signal treatment circuit that do not overlap.
Method of the present invention, owing at first matrix signal is carried out that handle field and upset is handled, realization matrix algorithm more then, rather than first realization matrix algorithm is selected to export according to field signal again.Therefore can make that the column decoding circuit is simple, low-power consumption, low cost, and easily realize.On the matrix algorithms circuit is realized, do not adopt combination of multiplier and totalizer, dynamic circuit etc. further, but substitute the function of multiplier and totalizer with the demoder of other logical combination, the simplification circuit reduces area, the simplification logic control.
Description of drawings
Fig. 1 is a column drive circuit theory structure synoptic diagram in the embodiment of the invention;
Fig. 2 is a column decoding structural representation in the embodiment of the invention;
The orthogonal matrix of Fig. 3 for adopting in the embodiment of the invention;
Fig. 4 is all combined situation of video data in the embodiment of the invention;
The theoretical value of Fig. 5 for obtaining according to algorithm in the embodiment of the invention;
Fig. 6 is a column decoding in the embodiment of the invention;
Fig. 7 is the treatment circuit that do not overlap of signal in the embodiment of the invention;
Fig. 8 is a level shifter in the embodiment of the invention;
Fig. 9 is a voltage selector in the embodiment of the invention.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment
Below, with reference to accompanying drawing preferred implementation of the present invention is described in detail.And, below illustrated embodiment be not improper qualification to the content of the present invention in the claim protection domain.And, below described all formations be not of the present invention must composed component.
For the ease of understanding, before describing specific embodiment, earlier the principle of multirow liquid crystal is carried out simple an introduction.
Liquid crystal fine scanning type of drive promptly is the scanning technique that at every turn scans multirow simultaneously.On signal Processing, used the orthogonality principle of orthogonal function.
Based on demonstration, the drive principle of liquid crystal, as can be known, lcd drive chip provides address and data to liquid crystal panel respectively by row-column electrode.In the type of drive of lining by line scan, each clock period of column drive circuit is sent the data of delegation, and in the fine scanning type of drive, each clock period of column drive circuit is sent the data message of multirow, through the too much stack of field, on display panel, obtain wanting data presented.
In fine scanning drives, suppose that being used for the orthogonal matrix of deal with data is O-1 ((N-1) * N), the signal that just can obtain the line scanning electrode is the periodic output O matrix of branch N field, and the signal of row drive electrode is to handle with the data that orthogonal matrix O-1 ((N-1) * N) comes out to register to obtain.
From the analysis in theory of mathematics, the signal of supposing line scanning is by the form scanning of orthogonal matrix O, and the data presented of of reading from register is D, then: the row drive electrode output be
S＝O
-1D
On each pixel, the stack of row and column, the relational expression of available mathematics is expressed as
D＝OO
-1D＝ED
Quadrature reduction by ranks has obtained wanting data presented on screen.
As shown in Figure 1, column drive circuit device of the present invention comprises column decoding 010, signal do not overlap treatment circuit 011, level shifter 012 and voltage selector 013, and matrix signal arrives voltage selector 013 by do not overlap treatment circuit 011, level shifter 012 of column decoding 010, signal successively.As shown in Figure 2, described column decoding comprises signal processing circuit 101, demoder 102, Control of Voltage selector switch 103.Signal processing circuit 101 is at first to the matrix signal processing of overturning; Data-signal and the matrix signal of handling through energizing signal are sent into demoder 102 synchronously and are carried out the matrix operation processing; Control of Voltage selector switch 103 is selected corresponding voltage control signal according to the output of demoder 102, outputs to the signal treatment circuit 011 that do not overlap.
Method in the embodiment may further comprise the steps:
A, control circuit output to column decoding 010 with data synchronously from data register, and simultaneously, the matrix signal of field signal control also outputs to column decoding 010;
B, 010 pair of data of column decoding are handled, and output to the signal treatment circuit 011 that do not overlap;
C, the signal 011 pair of signal of circuit that do not overlap is handled, and delivers to level displacement circuit 012;
After D, the process level shift, output to voltage selector 013;
E, select voltage, deliver on the electrode of display panel video data on display panel through voltage selector;
Described steps A comprises following step:
A1, data divide clock to send from data storage cell;
A2, the data sent deposit register or latch in through clock synchronization;
A3, above-mentioned data and matrix signal are input to column decoding synchronously.
Comprise following step among the described step B:
B1, signal processing circuit are at first to the matrix signal processing of overturning.Above-mentioned matrix signal is the signal according to field information output;
B2, data-signal and the matrix signal of handling through energizing signal are sent into demoder synchronously;
B3, Control of Voltage selector switch select corresponding voltage control signal according to the output of demoder, output to signal among the step C treatment circuit that do not overlap.
The field signal of mentioning among the step B is because in the multirow liquid crystal drive, comprises a plurality of in the same frame; Again because liquid crystal need load AC signal, so there is upset to handle;
The signal that described step C produces the step B processing that do not overlap.
Level displacement circuit 012 is transformed into high voltage level with low voltage level among the step D;
The modulation matrix that the embodiment of the invention adopts as shown in Figure 3.The orthogonal matrix O of example of the present invention is the orthogonal matrix of triplex row four row.Four elements of first row are-1,1,1,1 successively; Four elements of second row are 1 ,-1,1,1 successively; Four elements of the third line are followed successively by: 1,1 ,-1,1; When selecting orthogonal matrix, circuit is implemented simply, the frequency change of adjacent two row is as far as possible little.Before concrete circuit is realized, determine modulation matrix earlier.
Data presented is binary data combination of three as shown in Figure 4, has represented all data of three from 000～111.
In Fig. 5, the 51st, according to above-mentioned principle, the result of product of first row of the commentaries on classics order matrix of the data of Fig. 4 and orthogonal matrix O; The 52nd, the row element of the commentaries on classics order matrix of the data of Fig. 4 and orthogonal matrix O is the array that obtains of XOR respectively; 51 and 52 exist a kind of corresponding relation, shown among the figure 53, with 532 summations that XOR obtains, are 531, so, among the present invention, utilize this corresponding relation, substituted summing circuit with XOR.The principle that drives according to multirow, 2,3 numerical value corresponding voltage V in 51; 0,1 corresponding voltage VN.The algorithm of remaining triplex row is identical, and the like.
According to the modulation matrix that the embodiment of the invention adopts, the column decoding of the embodiment of the invention as shown in Figure 6.Column decoding has signal processing circuit 61, decoder circuit 62 and Control of Voltage selector switch 63.Signal processing circuit 61 comprises three identical alternative circuit I 64, I65 and I66, three identical phase inverter I61, I62 and I63.Demoder 62 has three identical XOR gate I67, I68 and I69.Control of Voltage selector switch 63 has XOR gate I610, three Sheffer stroke gate I611, and I612 and I613 also have a phase inverter I614 in addition.
The control end of alternative circuit is energizing signal T.Input signal M＜0 〉, M＜0 anti-phase, M＜1 〉, M＜1 anti-phase and M＜2, M＜2 the anti-phase alternative circuit I 64 that is input to successively, I65 and I66.Alternative circuit I 64, XOR gate I67 is delivered in the output of I65 and I66 successively, I68 and I69.Another input signal of XOR gate I67 is data inputs D＜0 〉, another input signal of I68 is data input D＜1 and another input signal of I69 be that data are imported D＜2.The input end of the output right and wrong door I612 of I67, another input of I612 is the output of I610, the output of XOR gate I68 and XOR gate I69 is 2 input ends of XOR gate I610,2 outputs that input end also is XOR gate I68 and XOR gate I69 of Sheffer stroke gate I611.The input of I613 is the output of I612 and I611.The output of I613 is the V_CTRL output terminal, also is the input end of phase inverter I614, and the output terminal of I614 is the VN_CTRL output terminal.
M＜0:2〉be the matrix signal of sending into according to field information, according to above-mentioned matrix, first M＜0:2〉be low level (1) successively, high level (1) and high level (1), second M＜0:2〉be high level (1) successively, low level (1) and high level (1), and the like.Because liquid crystal panel needs AC field, so voltage will constantly overturn, T is the upset control signal, when being low level as if T, and M＜0〉be low, the output of alternative circuit I 64 also is low level, if when T was high level, the output of alternative circuit I 64 also was high level, on the contrary opposite, other M＜1 〉, M＜2〉in like manner.D＜2:0〉be the data in synchronization of exporting in the register.
M＜0:2〉handle through signal processing circuit 61 and to deliver to decoding scheme 62, this moment D＜2:0 from register output synchronously arrive 62 synchronously with 61 output, voltage selection control 63 is selected the control signal V_CTRL or the VN_CTRL of corresponding voltage according to the output of decoding scheme.
Be not particularly limited, Fig. 7 is the embodiment of the invention signal treatment circuit schematic diagram that do not overlap.Input signal IN obtains signal ID through I71, and IN and ID obtain output signal OUT1 through rejection gate I72, and IN and ID are through obtaining output signal OUT2 with door I73, and OUT1 and OUT2 are non-overlapping control signals.Delay circuit I71 can finish or adopt RC time-delay realization with the phase inverter time-delay.
Be not particularly limited, Fig. 8 is an embodiment of the invention level displacement circuit.Because the row driving voltage much larger than the normal voltage (being generally 3.3V) of Digital Logic, must be high relatively voltage so the switch of voltage selector is selected the selected level of signal.In order to form this selection signal, use the level displacement circuit shown in Fig. 8.Level displacement circuit makes logical signal carry out the about 0～3.3V to 0 of level conversion～11V, corresponding to selected level.
This level displacement circuit has the N-channel MOS FETQ3 and the Q4 of earth potential one side that is arranged on circuit, is arranged on P channel mosfet Q1 and the Q2 and the inverter circuit INV of high voltage one side.P channel mosfet Q1 and Q2 are in the lock state, make its grid and the drain electrode cross connection.The drain electrode of N-channel MOS FETQ3 and Q4 is connected respectively to the drain electrode of P channel mosfet Q1 and Q2, and input signal is input to the grid of MOSFETQ4.Flowed to the grid of MOSFETQ3 by the anti-phase input signal of inverter circuit INV.Send the shared of MOSFETQ1 and Q3 to form output signal with the drain electrode that is connected.
When input signal was in low level, N-channel MOS FETQ4 was in cut-off state, and the output signal of inverter circuit INV is in high level.Therefore N-channel MOS FETQ3 is in conducting state.The conducting state of MOSFETQ3 makes P channel mosfet Q2 be in conducting state.It is VH that the cut-off state of MOSFETQ4 makes the grid voltage of P channel mosfet Q1, so Q1 is in cut-off state.Output signal is in low level.
When input signal changes over high level from low level, N-channel MOS FETQ4 is in conducting state, thereby N-channel MOS FETQ3 is in cut-off state.The conducting state of N raceway groove Q2 is drawn out to low level one side with the grid potential of P raceway groove Q3, thereby makes Q1 be in conducting state.The conducting of Q1 makes the grid voltage of Q2 be charged to VH, thereby Q2 is ended.Output signal is in the high level as the VH of the conducting state of corresponding P channel mosfet Q1.
Fig. 9 selects circuit for embodiment of the invention level.This level is selected circuit to have the N-channel MOS FETQ6 of electronegative potential one side that is arranged on circuit and is arranged on the P channel mosfet Q5 of high voltage one side.The MOSFETQ5 of N-channel MOS FETQ6 and P raceway groove is connected.The drain electrode of MOSFETQ6 is connected to the drain electrode of Q5, and output signal V_OUT draws from the drain electrode junction.Input signal INA, INB are input to the grid of MOSFETQ5 and Q6 respectively.
Input signal INA, INB are overlap signals not, when input signal INA is low, INB also when low, the MOSFETQ5 conducting of P raceway groove, and the MOSFETQ6 of N raceway groove ends, and makes that output voltage is high level V; When input signal INA is high, when INB also is high, the MOSFETQ5 cut-off state of P raceway groove, and the MOSFETQ6 of N raceway groove is in conducting state, makes that output voltage is low-voltage VN; When input signal INA is high, INB is when low, and MOSFETQ5, Q6 are in cut-off state, the output high resistant; It is low that this circuit is avoided input signal INA, and INB is the high input signal end that appears at.
Claims (4)
1. the implementation method of column drive circuit in the liquid crystal drive system may further comprise the steps:
A, control circuit output to column decoding with data synchronously from data register, and simultaneously, the matrix signal of field signal control also outputs to column decoding;
B, column decoding are handled data, output to the signal treatment circuit that do not overlap;
C, the signal circuit that do not overlap is handled signal, delivers to level displacement circuit;
After D, the process level shift, output to voltage selector;
E, select voltage, deliver on the electrode of display panel video data on display panel through voltage selector;
It is characterized in that: comprise following step among the described step B:
B1, at first to the matrix signal processing of overturning;
B2, the matrix signal that data-signal and process energizing signal are handled carry out the matrix operation processing;
B3, the signal after matrix operation handled output to signal among the step C treatment circuit that do not overlap.
2. the implementation method of column drive circuit in the liquid crystal drive system according to claim 1, it is characterized in that: the several steps among the described step B is:
B1, signal processing circuit are at first to the matrix signal processing of overturning;
B2, data-signal and the matrix signal of handling through energizing signal are sent into demoder synchronously and are carried out the matrix operation processing;
B3, Control of Voltage selector switch select corresponding voltage control signal according to the output of demoder, output to signal among the step C treatment circuit that do not overlap.
3. the dedicated column decoding of the implementation method of column drive circuit in the liquid crystal drive system, but comprise matrix signal overturn the signal processing circuit handled, can carry out the decoding circuit that matrix operation is handled, the data that are shown output to column decoding from register, processing through column decoding, the control signal that obtains is handled through the clock circuit that do not overlap again, it is characterized in that: signal processing circuit is at first to the matrix signal processing of overturning; Decoding circuit carries out delivering to after matrix operation is handled the clock circuit that do not overlap to the matrix signal of handling through upset again to be handled.
4. the dedicated column decoding of the implementation method of column drive circuit in the liquid crystal drive system according to claim 3, it is characterized in that: described decoding circuit comprises demoder, the Control of Voltage selector switch of logical combination, and signal processing circuit is at first to the matrix signal processing of overturning; Data-signal and the matrix signal of handling through energizing signal are sent into demoder synchronously and are carried out the matrix operation processing; The Control of Voltage selector switch is selected corresponding voltage control signal according to the output of demoder, outputs to the signal treatment circuit that do not overlap.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062707A CN100589167C (en) | 2006-09-20 | 2006-09-20 | The implementation method of column drive circuit and dedicated column decoding in the liquid crystal drive system |
| PCT/CN2007/070722 WO2008040235A1 (en) | 2006-09-20 | 2007-09-18 | A drive method and a column-decoding circuit and a driving circuit for a liquid display panel |
| US11/903,355 US7940257B2 (en) | 2006-09-20 | 2007-09-20 | Methods for segment driver circuits and application specific SEG decoders in LCD driver systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062707A CN100589167C (en) | 2006-09-20 | 2006-09-20 | The implementation method of column drive circuit and dedicated column decoding in the liquid crystal drive system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101149905A true CN101149905A (en) | 2008-03-26 |
| CN100589167C CN100589167C (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610062707A Expired - Fee Related CN100589167C (en) | 2006-09-20 | 2006-09-20 | The implementation method of column drive circuit and dedicated column decoding in the liquid crystal drive system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7940257B2 (en) |
| CN (1) | CN100589167C (en) |
| WO (1) | WO2008040235A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940022149A (en) * | 1993-03-24 | 1994-10-20 | 세야 히로미찌 | Liquid crystal display device |
| JPH07287552A (en) * | 1994-04-18 | 1995-10-31 | Matsushita Electric Ind Co Ltd | Liquid crystal panel driving device |
| JPH1031460A (en) * | 1996-07-17 | 1998-02-03 | Matsushita Electric Ind Co Ltd | Driving device of liquid crystal display panel |
| JP3736622B2 (en) * | 2001-06-15 | 2006-01-18 | セイコーエプソン株式会社 | Line drive circuit, electro-optical device, and display device |
| JP3801140B2 (en) * | 2003-03-06 | 2006-07-26 | セイコーエプソン株式会社 | Display driver, electro-optical device, and driving method |
| JP2004294968A (en) * | 2003-03-28 | 2004-10-21 | Kawasaki Microelectronics Kk | Multi-line addressing driving method and device for simple matrix liquid crystal |
| CA2526467C (en) * | 2003-05-20 | 2015-03-03 | Kagutech Ltd. | Digital backplane recursive feedback control |
| JP4448910B2 (en) * | 2003-06-05 | 2010-04-14 | 株式会社ルネサステクノロジ | Liquid crystal drive method, liquid crystal display system, and liquid crystal drive control device |
-
2006
- 2006-09-20 CN CN200610062707A patent/CN100589167C/en not_active Expired - Fee Related
-
2007
- 2007-09-18 WO PCT/CN2007/070722 patent/WO2008040235A1/en active Application Filing
- 2007-09-20 US US11/903,355 patent/US7940257B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN100589167C (en) | 2010-02-10 |
| WO2008040235A1 (en) | 2008-04-10 |
| US20080068370A1 (en) | 2008-03-20 |
| US7940257B2 (en) | 2011-05-10 |
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